Spei Satelles (SpeiSat)
Spei Satelles (SpeiSat)
Spei Satelles (SpeiSat)
Name SPEI-SATELLES (SpeiSat (“Guardian of Hope”))
Type CubeSat
Units or mass 3U
Status not launched, expected in 2023
Organisation Politecnico di Torino
Institution University
Entity Academic / Education
Nation Italy
Partners Vatican, Polytechnic University of Turin, National Research Council of Italy

SpeiSat physically keeps a nanobook with the Holy Father's book in his shell and a file containing the messages of hope to be spread during his journey.


SPEI-SATELLES is cubesat with communication purposes. It will send ASCII code corresponding to phrases in English, Spanish and Italian language. The phrases are no more than 3000 characters, 1000 for each language. The communication happens every at least 3 minutes. Commands can be sent to manage the onboard operation from ground.

SpeiSat hosts several components: two on-board computers, two communication systems in the UHF band (it is therefore equipped with two antennas), a battery for energy storage, small magnets for satellite stabilization after launch and a suite of thermal and inertial sensors to collect measurements in the space environment.

Spei Satelles is a space mission that aims to be a sign of hope for all humanity. Promoted by the Dicastery for Communication, the mission is coordinated by the Italian Space Agency (ASI), the public body that prepares and implements the Italian space policy in accordance with the Government guidelines.

The mission participants include the Polytechnic University of Turin, which designed and built the satellite, and the CNR which created the nanobook from which the entire mission originated. The logo is the work of the young people of the IUSVE of Venice while the pastoral/cultural coordination was assigned to the Digital Apostolate, Archdiocese of Turin.

Spei Satelles contains a nanobook, a 2x2x0.2 mm silicon slab on which the images, speeches and readings of the moment of prayer celebrated by Pope Francis on March 27, 2020 were imprinted by nanotechnologies, in the midst of the pandemic. Those words and those gestures have become an icon of hope, a seed of hope from which to start again.

During its stay in sun-synchronous orbit, Spei Satelles will transmit a radio signal that can be perceived with amateur instruments. The signal contains messages of hope from the magisterium of Pope Francis.

Sources [1] [2] [3]
Photo sources [1] [2] [3]

Last modified: 2023-06-10
Detailed Spei Satelles (SpeiSat) entry in the Database
Full Nanosats Database (much more data)

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